From f3111502c065d32dcb021f55e30398aaebd8fb0f Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 28 Apr 2006 15:30:03 -0700
Subject: [PATCH] [XFRM]: fix incorrect xfrm_state_afinfo_lock use
xfrm_state_afinfo_lock can be read-locked from bh context, so take it
in a bh-safe manner in xfrm_state_register_afinfo() and
xfrm_state_unregister_afinfo(). Found by the lock validator.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/xfrm/xfrm_state.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 3dc3e1f3b7aa..93a2f36ad3db 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1061,7 +1061,7 @@ int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
return -EINVAL;
if (unlikely(afinfo->family >= NPROTO))
return -EAFNOSUPPORT;
- write_lock(&xfrm_state_afinfo_lock);
+ write_lock_bh(&xfrm_state_afinfo_lock);
if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
err = -ENOBUFS;
else {
@@ -1069,7 +1069,7 @@ int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
afinfo->state_byspi = xfrm_state_byspi;
xfrm_state_afinfo[afinfo->family] = afinfo;
}
- write_unlock(&xfrm_state_afinfo_lock);
+ write_unlock_bh(&xfrm_state_afinfo_lock);
return err;
}
EXPORT_SYMBOL(xfrm_state_register_afinfo);
@@ -1081,7 +1081,7 @@ int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
return -EINVAL;
if (unlikely(afinfo->family >= NPROTO))
return -EAFNOSUPPORT;
- write_lock(&xfrm_state_afinfo_lock);
+ write_lock_bh(&xfrm_state_afinfo_lock);
if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
err = -EINVAL;
@@ -1091,7 +1091,7 @@ int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
afinfo->state_bydst = NULL;
}
}
- write_unlock(&xfrm_state_afinfo_lock);
+ write_unlock_bh(&xfrm_state_afinfo_lock);
return err;
}
EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
--
2.34.1